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Unit Converters

Pounds to Stone Converter

Convert pounds into stone and pounds, the way weight is usually quoted in the UK and Ireland. Enter a figure in pounds and get the stone equivalent alongside kilograms.

Enter a weight

Decimals are fine — 154.5 lb converts as readily as a whole number.

One stone is exactly 14 pounds.

Your result

Sample values

11 st 0 lb

Stone and pounds

11.00

Stone, decimal

69.85

Kilograms

154 lb converts to exactly 11 stone.

How to use this converter

Enter the weight in pounds. The result shows stone and remaining pounds in the form people actually say it — "eleven stone four" — along with a decimal stone figure for spreadsheets and a metric equivalent.

Converting the other way

To go from stone to pounds, multiply the stone by 14 and add the leftover pounds. Eleven stone four is (11 × 14) + 4 = 158 lb.

Formula

Stone = Pounds ÷ 14

Remaining pounds = Pounds mod 14

Kilograms = Pounds × 0.45359237

mod
The remainder after dividing — 158 mod 14 = 4
0.45359237
The exact international pound in kilograms

The stone is a unit of exactly 14 pounds, so the conversion is exact rather than approximate.

Converting 158 pounds

A weight taken from a set of US scales, wanted in stone.

  1. Whole stone = 158 ÷ 14 = 11.29, so 11 stone
  2. Remaining pounds = 158 − (11 × 14) = 4 lb
  3. Kilograms = 158 × 0.4536 = 71.67 kg

158 lb is 11 st 4 lb, or 71.67 kg.

Understanding your results

The stone-and-pounds form is what you would say out loud, and what a UK doctor's notes or a boxing weigh-in would record. The decimal stone figure is the same weight expressed as a single number, which is what you want if you are tracking a series of measurements in a spreadsheet or on a chart — 11.29 st sorts and averages correctly, whereas "11 st 4 lb" does not.

Where the stone is still used

Body weight in the UK and Ireland, almost exclusively. Everything else — food, freight, sport outside boxing and horse racing — moved to kilograms or metric tonnes. It is not used in the US at all, which is why a US-bought scale gives pounds and a conversion is needed in the first place.

Questions

About this calculator

Ask something else

Exactly 14. The stone was standardised at 14 pounds for weighing people and wool, and unlike many older units it has a single fixed value, so the conversion is exact.

They are the same weight written two ways. Stone and pounds is the spoken form. Decimal stone is the same value as a single number, which is what you need for charting or averaging a set of readings.

Yes. Both use the international avoirdupois pound of 0.45359237 kilograms, fixed by agreement in 1959. The difference is only which larger unit gets used alongside it.

Spoken as “eleven stone four” — the word pounds is usually dropped. A weight that lands on a whole stone is said as “eleven stone exactly” or just “eleven stone”.

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